The proxy can now sit between a client and a https web server. It does
this by looking for a CONNECT request that conventional proxies use to
open a tunnel between a client and an https server. Instead of opening
an opaque tunnel, yaip immediately sends bacck a "connection
established" response. This tells the client (browser normally) to
proceed and initiate an HTTPS connection.
I use the host that was send in the connect request to set up a fake SSL
server. If we have seen the domain before, we re-use the certificate,
otherwise we generate a new one and sign it using YAIP's built in
certificate authority.
I still need to do work on forwarding the request upstream. This is my
next job. Currently, yaip responds with a valid response of "it worked".
```
$ curl https://example.com --cacert ~/.config/yaip/cert.pem
It worked
```
Notice, we don't get any certificate errors because we are telling curl
to trust the authority that yaip uses
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